At 8/4/2004 05:25 AM, you wrote:
I use an ARR preamp on my 6 meter repeater and optimum performance is with
a 3dB pad (if I remember the value correctly) on the INPUT of the
preamp. Now, this may seem crazy to some, but it works. I learned this
from Jay who owns ARR here in Connecticut.
It
At 8/2/2004 08:27 PM, you wrote:
--- In Repeater-Builder@yahoogroups.com, Jeff DePolo [EMAIL PROTECTED]
wrote:
...I have quiet 440 sites that will break squelch and decode PL at
0.03 uV (Angle Linear PHEMT's doing the job)...
__
At 8/3/2004 09:49 AM, you wrote:
Huh. You're right, I didn't do the math. That's one problem with using
lossy tees to check effective sensitivity - the sig gen isn't terminated in
50 ohms.
I don't think that matters as long as the sig. gen. output is pure 50 + j0
ohms. If it wasn't, the
2 meters is a little different since most G.E./Motorola radios have a
little better sensitivity, the noise floor of 2 meters is
much higher. I
once measured the 2 meter noise floor here to be ~3000 K, or
-122 dBm in a
16 kHz bandwidth. That's wny I almost never recommend a
preamp
I have a 2 meter repeater made from a GE Mastr Pro located at a hi level RF
site with TV, FM broadcast, land mobile VERY near by and/or on the same
tower. I use a 6 cavity pass/reject duplexer. I notice definate improvement
WITH an (ARR) GaAsFET pre-amp AND a extra pass-cavity on the input. (I
In a standard MASTRII the first active stage is the MIXER. You can
order a UHS preamp but it is not standard. My point was, with a
duplex repeater the TX and rx is operating at the same time in every
digipeater the data is received then retransmitted (you can use a
standard transceiver for a
It would be a VERY good way!!
Paul Finch [EMAIL PROTECTED] wrote:
What the heck are you doing in Yokohama? You have to explain the things
that would make a grown man cry thing, in a good way or bad?
Paul
-Original Message-
From: JOHN MACKEY [mailto:[EMAIL PROTECTED]
This is
OK, then, I am jealous! Take pictures!
-Original Message-
From: JOHN MACKEY [mailto:[EMAIL PROTECTED]
Sent: Sunday, August 01, 2004 10:09 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: GE Master Pro
It would be a VERY good way!!
Paul Finch [EMAIL
I didn't mind the dynamotors ... servicing them wasn't a problem
either.
Neil
Coy Hilton wrote:
Isn't it the truth. The MASTR PRO used to do .5uV / 20 db on VHF
with NO problem tuned by the book, but UHF was a bit touchier it
took the added tuning devices of a few rubber fingers
GEE! Are some of us getting old or what.
Brought back the double dog house to mindsmile.
73 Russ, W3CH
- Original Message -
From: Neil McKie [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, August 01, 2004 2:49 AM
Subject: Re: [Repeater-Builder] Re: GE Master Pro
I used a Mastr Pro VHF for a digipeater years ago. I was on a hilltop
that noone else could get anything on VHF working due to intermod and
frontend overload. The Mastr Pro preformed flawlessly! Due to the
passive front end, it seems imprevious to IM and overlaod.
Sometimes sensitivity can be
That is exactly why I refuse to get rid of three Mastr Pro UHF receivers!
Paul
WB5IDM
-Original Message-
From: Joe [mailto:[EMAIL PROTECTED]
Sent: Sunday, August 01, 2004 9:01 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: GE Master Pro
I used a Mastr Pro VHF
Actually I have several repeaters still as Mastr Pro's on 6 meters, 2 meters,
UHF back in the states. The receivers are very good at high RF sites (like
a lot of land mobile, TV, FM broadcast). On 2 meters UHF, I always run a
ARR GaAsFET pre-amp on them. If I didn't have TV channel 2 in
If I remember correctly, There's a huge difference between a Full
duplex voice repeater and a Simplex digipeater. I also seem to
remember that the MASTR PRO had the same number of helical poles
that the MASTRII has. I do remember replacing a mixer transistor
that was in a board inside one of
The first active stage in the Mastr Pro was the mixer, the Mastr II has an Rf amplifier stage if my memnory serves me. That's the big difference..
As far as intermod and overload, there really is no huge difference between simplex and a repeater. Coy Hilton [EMAIL PROTECTED] wrote:
If I
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